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7-3
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
OL-18634-01
Chapter 7 Troubleshooting
Troubleshooting the Fan Trays
Step 5 Verify that the power supply unit is functional by replacing it with another power supply (see the
“Replacing a Power Supply Unit During Operations” section on page 8-1) and plugging its power cords
into the same AC source. If the Input and Output LEDs turn green on the replacement power supply unit,
contact Customer Service (see the
“Contacting Customer Service” section on page 7-6) to replace the
defective power supply unit.
If you are unable to determine the problem with the power supply or determine which power supply unit
has the problem, contact TAC.
Troubleshooting the Fan Trays
The following conditions indicate that there is a problem with one or more fan tray modules:
• The FAN LED on the chassis is amber.
• The STATUS LED on the fan tray is flashing red.
While the system is running, each fan tray module should be exhausting air and its STATUS LED should
be green, which indicates that all of the fans in that tray are running above the threshold speed.
For a listing of the fan tray LEDs and the conditions that they indicate, see Table C-6 on page C-6.
To troubleshoot a fan tray problem, follow these steps until the problem is resolved:
Step 1 Check if the STATUS LED is flashing red or is not lit on each fan tray. If the LED is flashing red, at least
one fan in the tray is running at a slow speed or not running. If the LED is not lit, no power is going to
the fan tray.
Step 2 Check if the power supply units are providing power to the chassis components. See the
“Troubleshooting the Power Supply” section on page 7-2.
Step 3 Make sure that the fan tray is properly seated in the chassis by following these steps:
a. Loosen the captive screws on the fan tray until they are no longer in the chassis.
b. Place one hand on the handle for the fan tray and pull the fan tray part way out of the chassis.
c. Push the fan tray back into the chassis until it is fully seated on the midplane and make sure that
each captive screw on the fan tray is aligned with its hole in the chassis.
d. Securely tighten each captive screw (to 8 lb. in.) to the chassis.
Step 4 Call Customer Service and describe the conditions that you are seeing with the fan tray. See the
“Contacting Customer Service” section on page 7-6.
Troubleshooting the Supervisor Modules
The following conditions indicate a problem with one or more supervisor modules:
• The SUP LED on the chassis is amber.
• The STATUS LED on a supervisor module is amber, red, or not lit.
• The CMP STATUS LED on a supervisor module is amber or red.
• An ACT LED on a supervisor module is not lit.
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